試題詳解

50. Isolated populations will lose a percentage of their original diversity over time, approximately at the rate of 1/(2N) per generation, where N= population size. After 20 generations, the original population of 500 will lose ___ of its original genetic variation.
(A) 20%
(B) 2%
(C) 4%
(D) 8%
(E) 16%.